Flutter uses a GridView to write a GridList that automatically increments based on the number of children

class GrideMenu extends StatelessWidget {
GrideMenu({
	Key key,
    @required this.items,
    @required this.onTap,
    @required this.crossAxisCount 
   }):super(key:key);
   
	final List items;  / / the number of children
	final Function onTap; // Child's click event
	final int crossAxisCount; // The number of children per row
    
  Widget build(context) {
  	
    // Mod the number of children
    // If it is not equal to 0, there are extra children
    // Then the number of lines must be increased by 1
    final int more = items.length % crossAxisCount;
    final int minCount = items.length ~/ crossAxisCount;
    final int maxCount = more == 0 ? minCount : minCount + 1;
    // Get the width
    final screenWidth = MediaQuery.of(context).size.width;
    // Find the width of a single child
    final itemWidth = screenWidth /crossAxisCount;
    return Container(
      width: context.width,
      padding: EdgeInsets.all(8),
      height: maxCount * (itemWidth - 10.0),
      child: GridView.builder(
      	// Children in the GridView will not be allowed to scroll
          physics: NeverScrollableScrollPhysics(),
          itemCount: items.length,
          gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
              // Number of elements on the horizontal axis
              crossAxisCount: crossAxisCount,
              // Vertical axis spacing
              mainAxisSpacing: 5.0.// Horizontal axis spacing
              crossAxisSpacing: 5.0.// Ratio of sub-component width to height to length
              childAspectRatio: 1),
          itemBuilder: (ctx, index) {
            return Column(
              mainAxisAlignment: MainAxisAlignment.center,
              crossAxisAlignment: CrossAxisAlignment.center,
              children: [
                GestureDetector(
                  onTap: onTap,
                  child: Container(
                    color:Color(0xff0099ff(), [, (); })); }}Copy the code